Officially, Somewhere There can be found at 227 Sterling Ave, unit 112. This address is somewhat misleading, however. In reality, the space can be found at the corner of Ruttan Street and Merchant Lane, as seen in the map below.

You might get to Somewhere There...

...from Dundas West Station by walking east along Bloor and turning right down Ruttan Street.
...from Lansdowne Station by walking west along Bloor and turning left down Ruttan Street.

Either way, aftern heading down Ruttan Street, you will find Somewhere There just to your left where Ruttan turns in to Merchant Lane.